new file mode 100644
--- /dev/null
+++ b/browser/config/tooltool-manifests/win64/webrender.manifest
@@ -0,0 +1,26 @@
+[
+  {
+    "version": "Visual Studio 2017 15.8.4 / SDK 10.0.17134.0",
+    "digest": "ecf1e03f6f98f86775059a43f9e7dc7e326f6643d7c08962d9f614e4f5a65b1ca63fa1cfeb0f1a3c2474bf0d4318dda960b378beb2a44ecf8a91111207f4ece5",
+    "size": 349626009,
+    "algorithm": "sha512",
+    "filename": "vs2017_15.8.4.zip",
+    "unpack": true
+  },
+  {
+    "version": "CMake 3.6.2 repack",
+    "size": 19832889,
+    "digest": "39b0508b60f655969d1b54c76753b14b5b2e92dab58613c835aed798a6aeb9077a7df78aebc011c2c753661fdc15007d3353c0c8773a53148380e2ec02afb629",
+    "algorithm": "sha512",
+    "filename": "cmake362.zip",
+    "unpack": true
+  },
+  {
+    "version": "Ninja 1.7.1",
+    "size": 184821,
+    "digest": "e4f9a1ae624a2630e75264ba37d396d9c7407d6e6aea3763056210ba6e1387908bd31cf4037a6a3661a418e86c4d2761e0c333e6a3bd0d66549d2b0d72d3f43b",
+    "algorithm": "sha512",
+    "filename": "ninja171.zip",
+    "unpack": true
+  }
+]

--- a/taskcluster/ci/webrender/kind.yml
+++ b/taskcluster/ci/webrender/kind.yml
@@ -14,40 +14,43 @@ transforms:
 
 job-defaults:
     run-on-projects: ['mozilla-beta', 'trunk', 'try']
     treeherder:
         tier: 2
         kind: other
     worker:
         max-run-time: 1800
-        docker-image: {in-tree: webrender}
         env:
             RUST_BACKTRACE: 'full'
             RUSTFLAGS: '--deny warnings'
 
 jobs:
     lint-tidy:
         description: Runs linting checks on WebRender code
         worker-type: aws-provisioner-v1/gecko-{level}-b-linux
+        worker:
+            docker-image: {in-tree: webrender}
         run:
             using: run-task
             command: >-
                 cd $HOME/checkouts/gecko/gfx/wr &&
                 servo-tidy
         treeherder:
             platform: linux64-qr/opt
             symbol: WR(tidy)
         when:
             files-changed:
                 - 'gfx/wr/**'
 
     linux-release:
         description: Runs release-mode WebRender CI tests on a Linux worker
         worker-type: aws-provisioner-v1/gecko-{level}-b-linux
+        worker:
+            docker-image: {in-tree: webrender}
         toolchains:
             - linux64-rust
             - wrench-deps
         run:
             using: run-task
             command: >-
                 cd $HOME/workspace &&
                 $HOME/checkouts/gecko/mach artifact toolchain -v $MOZ_TOOLCHAINS &&
@@ -61,16 +64,18 @@ jobs:
             kind: other
         when:
             files-changed:
                 - 'gfx/wr/**'
 
     linux-debug:
         description: Runs debug-mode WebRender CI tests on a Linux worker
         worker-type: aws-provisioner-v1/gecko-{level}-b-linux
+        worker:
+            docker-image: {in-tree: webrender}
         toolchains:
             - linux64-rust
             - wrench-deps
         run:
             using: run-task
             command: >-
                 cd $HOME/workspace &&
                 $HOME/checkouts/gecko/mach artifact toolchain -v $MOZ_TOOLCHAINS &&
@@ -80,8 +85,32 @@ jobs:
                 CARGOFLAGS="--verbose --frozen" ci-scripts/linux-debug-tests.sh
         treeherder:
             platform: linux64-qr/debug
             symbol: WR(wrench)
             kind: other
         when:
             files-changed:
                 - 'gfx/wr/**'
+
+    windows:
+        description: Runs WebRender CI tests on a Windows worker
+        worker-type: aws-provisioner-v1/gecko-t-win10-64
+        worker:
+            max-run-time: 5400
+            env:
+                TOOLTOOL_MANIFEST: 'browser/config/tooltool-manifests/win64/webrender.manifest'
+        toolchains:
+            - win64-rust
+            - wrench-deps
+        run:
+            using: run-task
+            command: '$GECKO_PATH/taskcluster/scripts/misc/wrench-windows-tests.sh'
+        treeherder:
+            platform: windows10-64-qr/release
+            symbol: WR(wrench)
+        when:
+            files-changed:
+                - 'build/win64/mozconfig.vs2017'
+                - 'browser/config/tooltool-manifests/win64/webrender.manifest'
+                - 'gfx/wr/**'
+                - 'taskcluster/scripts/misc/tooltool-download.sh'
+                - 'taskcluster/scripts/misc/wrench-windows-tests.sh'

new file mode 100644
--- /dev/null
+++ b/taskcluster/scripts/misc/wrench-windows-tests.sh
@@ -0,0 +1,58 @@
+#!/bin/bash
+set -x -e -v
+
+# This script runs the windows CI scripts for standalone WebRender. The CI
+# scripts build WebRender in various "standalone" (without Gecko)
+# configurations and also run WebRender's reftest suite using the `wrench`
+# tool in the WebRender repository.
+# The builds involved require a number of dependencies to be available,
+# which is all handled below.
+
+cd $GECKO_PATH
+
+# This will download the rustc, cmake, ninja, MSVC, and wrench-deps artifacts.
+WORKSPACE="$PWD/../../" taskcluster/scripts/misc/tooltool-download.sh
+export PATH=$PATH:$PWD/rustc/bin:$PWD/cmake/bin:$PWD/ninja/bin
+
+# We will be sourcing mozconfig files, which end up calling mk_add_options with
+# various settings. We only need the variable settings they create along the
+# way. Define mk_add_options as empty so the variables are defined but nothing
+# else happens.
+# This is adapted from the start of js/src/devtools/automation/winbuildenv.sh
+# which does a similar thing.
+mk_add_options() {
+    :
+}
+
+export topsrcdir=$PWD
+. $topsrcdir/build/win64/mozconfig.vs2017
+
+# In the msys bash that we're running in, environment variables containing paths
+# will *sometimes* get converted to windows format on their own, but it doesn't
+# happen consistently. See bug 1508828 around comment 9 onwards for some details.
+# To ensure we consistently convert the INCLUDE and LIB variables that MSVC
+# needs for building stuff, we do it here explicitly.
+
+convert_path_to_win() {
+    echo $1 |
+    sed -e 's#:#\n#g' |           # split path components into separate lines
+    sed -e 's#^/\(.\)/#\1:/#' |   # replace first path component (if one letter) with equivalent drive letter
+    sed -e 's#/#\\#g' |           # convert all forward slashes to backslashes
+    paste -s -d ';'               # glue the lines back together
+}
+
+export INCLUDE=$(convert_path_to_win "$INCLUDE")
+export LIB=$(convert_path_to_win "$LIB")
+
+# Move the wrench-deps vendored crates into place
+mv wrench-deps/{vendor,.cargo} gfx/wr
+cd gfx/wr
+
+# This is needed for the WebRender standalone reftests
+powershell.exe 'iex (Get-Content -Raw ci-scripts\set-screenresolution.ps1); Set-ScreenResolution 1920 1080'
+
+# Run the CI scripts
+export CARGOFLAGS='--verbose --frozen'
+export FREETYPE_CMAKE_GENERATOR=Ninja
+cmd.exe /c 'ci-scripts\windows-tests.cmd'
+cmd.exe /c 'ci-scripts\windows-pathfinder.cmd'